sin(a-派/4)=7根号2/10且派/2
来源:学生作业帮助网 编辑:作业帮 时间:2024/07/14 08:16:00
![sin(a-派/4)=7根号2/10且派/2](/uploads/image/z/8569858-58-8.jpg?t=sin%28a-%E6%B4%BE%2F4%29%3D7%E6%A0%B9%E5%8F%B72%2F10%E4%B8%94%E6%B4%BE%2F2)
x)+H}e;o774xc
H&H";z#Q|=:f)$%L7$`
FFP #4#5J% S@l#$AL0@XZӇtA<[cC}Cs<;RXt
sin(a-派/4)=7根号2/10且派/2
sin(a-派/4)=7根号2/10且派/2
sin(a-派/4)=7根号2/10且派/2
sin(a-π/4)=7√2/10 cos(a-4/π)=√2/10 sin(2a-2/π)=2sin(a-π/4)cos(a-4/π)=7/25
cos2a=-7/25 sin2a=-24/25 tan2a=24/7 tan(2a+4/π)=(tan2a+1)/(tan2a-1)=31/17